Results 61 to 70 of about 28,978 (207)

Non‐Invasively Tracking an Arbitrary Deformable Object Through Scattering Media and Around Corners via Speckle Correlations

Advanced Science, EarlyView.
A speckle correlation centroid localization method (SCCLM) is proposed for non‐invasive tracking of an arbitrary deformable object through scattering media and around corners, requiring no prior information. Its effectiveness is demonstrated not only in tracking hidden objects beyond the memory effect region but also in following objects undergoing ...
Aiping Zhai, Wenjing Ji, Yan Wang, Xiyuan Luo, Wenjing Zhao, Dong Wang, Fei Liu   +6 more
wiley   +1 more source

A Novel Mobile Localization Method for Distributed Sensor Network with Non-Line-of-Sight Error Mitigation

International Journal of Distributed Sensor Networks, 2014
Mobile localization using distributed sensor network has attracted significant research interest in recent years. One of the main challenges for mobile location estimation is the presence of the non-line-of-sight (NLOS) propagation.
Nan Hu, Hao Wu, Chengdong Wu, Yuan Gao
doaj   +1 more source

Molecular engineering of NLO-phores for new NLO microscopies

Comptes Rendus. Physique, 2002
Novel microscopies based on nonlinear optical (NLO) phenomena such as two-photon excited fluorescence (TPEF) and second-harmonic generation (SHG) have gained overwhelming popularity in the biology community owing to the many advantages they provide in biological imaging.
openaire   +1 more source

Zn(C2H4NO2)2(SO2CH3NH2)2 and Zn(C2H4NO2)2[SO2(NH2)2]: Regulation of Unique ZnO(C2H4NO2)2 Units by Polar Tetrahedrons for Balanced UV Nonlinear Optical Performance

Advanced Science, EarlyView.
The modulation of polar tetrahedra enabled the synthesis of an outstanding short‐wave UV NLO crystal, Zn(C2H4NO2)2[SO2(NH2)2], which achieves a rare balance of a large bandgap (5.93 eV), high birefringence (Δn = 0.126 at 546 nm), and strong SHG response (1.36 × KDP), especially achieving excellent phase‐matching throughout the full transparency range ...
Chenjie Cui, Yuchen Yan, Xin Wen, Jindong Chen, Jiyang Wang, Zhanggui Hu, Ning Ye, Guang Peng   +7 more
wiley   +1 more source

A fusion positioning method for underground personnel based on UWB and PDR

Gong-kuang zidonghua
Most existing fusion positioning methods for ultra-wideband (UWB) and pedestrian dead reckoning (PDR) ignore the correction of positioning errors in non line of sight (NLOS) environments.
JIA Yutao, LI Guanhua, PAN Hongguang, CHEN Haijian, WEI Xuqiang, BAI Junming   +5 more
doaj   +1 more source

Terahertz Channel Modeling, Estimation and Localization in RIS‐Assisted Systems

Advanced Electronic Materials, EarlyView.
Reconfigurable intelligent surfaces have become a recent intensive research focus. Based on practical applications, channel strategies for RIS‐assisted terahertz wireless communication systems are categorized into three different types: channel modeling, channel estimation, and channel localization.
Hongjing Wang, Weipeng Wang, Xuan Cong, Shiyu Wang, Gao Li, Sen Gong, Lin Huang, Hongxin Zeng, Yaxin Zhang, Ziqiang Yang   +9 more
wiley   +1 more source

Stochastic Geometry Modeling and Performance Evaluation of mmWave Cellular Communications

, 2015
In this paper, a new mathematical framework to the analysis of millimeter wave cellular networks is introduced. Its peculiarity lies in considering realistic path-loss and blockage models, which are derived from experimental data recently reported in the
Di Renzo, Marco
core   +2 more sources

Interpretable Machine Learning for Bandgap Prediction and Descriptor‐Guided Design Rules of Phosphates

Advanced Intelligent Discovery, EarlyView.
An explainable CatBoost model was trained to predict the bandgaps of 474 phosphate crystals based on composition and density descriptors. SHAP analysis identified two key variables—d‐electron‐count dispersion and atomic‐density dispersion—as the primary drivers of the model's predictions.
Wenhu Wang, Abudukadi Tudi, Ran An, Zhihua Yang   +3 more
wiley   +1 more source

Yeni Nesil Kablosuz Ağ Teknolojisi: Wimax Standardının İncelenmesi

Düzce Üniversitesi Bilim ve Teknoloji Dergisi, 2016
Wimax (Worldwide Interoperability for Microwave Access) teknolojisi, Wimax Forum tarafından çeşitli standartları geliştirilen, geniş alanda iletişim sağlayan bir kablosuz ağ teknolojisidir. Çalışma boyunca Wimax hakkında bilgi verilmiştir.
Arafat Şentürk, Zehra Karapınar Şentürk, Meryem Şentürk, Metin Çifci, Ekrem Başer   +4 more
doaj  

Deep Learning Based NLOS Identification with Commodity WLAN Devices

, 2017
Identifying line-of-sight (LOS) and non-LOS (NLOS) channel conditions can improve the performance of many wireless applications, such as signal strength-based localization algorithms.
Choi, Jeong-Sik, Kim, Seong-Cheol, Lee, Jae-Hyun, Lee, Jong-Ho, Lee, Woong-Hee   +4 more
core   +1 more source